The Drive eRazer is a stand alone device (so you don't need a functioning computer to use it) capable of erasing all the files on a drive by writing a data pattern over the entire disk. It costs $100 and can clean a 250GB drive in just short of two hours. For an extra $50 you can get one that makes multiple passes on the disk and writes random characters over the whole thing. You know, I'd consider one if I my current girlfriend was any smarter and I was worried about her discovering any of the "private pictures" I have on the computer. Fortunately for me she doesn't know what the hell a computer is. Just yesterday she mistook my laptop for a waffle maker. Luckily I caught her before she poured any batter.